Temperature dependence of fluorescence lifetime of 2-naphthol in ice (Ih) crystal: A study of the proton motion in ice

✍ Scribed by Ping Qi; Katsuhiko Okazaki; Tomoya Akiyama; Kohji Abe; Takeshi Shigenari

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 558 KB
• Volume: 230
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)01191-5

✦ Synopsis

The lifetime of the fluorescence from 2-naphthol (C,oH,OH) doped in ice I,, was measured from 27 to 300 K. The slow component 7, (5.3 ns at 27 K) shows a significant decrease in the temperature range 130-200 K, while the faster component (~~-0.7 ns) shows a slight decrease above 200 K. The relative intensity If/I, increases above 130 K. The results were interpreted in terms of a model involving the transfer between the two states, S, and S; , which correspond to the excited states of 2-naphthol with and without considering the trapping of proton with L defects in ice, respectively.